Summary of Contents for RF Communications 2000
- Page 2 MODEL 2000 FIXED CHANNEL CABLE MODULATOR AND MODEL 2000 I.F. MODULATOR EXCITER OUR MODEL 2000 FIXED CHANNEL MODULATOR HAS BEEN DESIGNED AS A WORKHORSE FOR DEMANDING APPLICATIONS WHERE A HIGH QUALITY, STABLE, AND RELIABLE LOW NOISE FIXED CHANNEL MODULATOR IS REQUIRED AT A REASONABLE PRICE.
- Page 3 MODEL 2000 FIXED CHANNEL MODULATOR SPECIFICATIONS: (NORTH AMERICAN NTSC) MAXIMUM OUTPUT LEVEL +60dBmV SPURIOUS OUTPUTS 5-750MHz: Less than 60dBc DIFFERENTIAL PHASE Less than 2 degrees DIFFERENTIAL GAIN Less than 3% VIDEO SIGNAL-TO-NOISE RATIO Better than 60dBc FREQUENCY RESPONSE TO 4.1MHz ±1dB...
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Page 4: Standard Features
TELEVISION MODULATOR INTRODUCTION: The Model 2000 Television Modulator is designed for use in broadcast and other applications where high quality stable signals are required. This unit, in the NTSC format, exceeds all Part 74 and 76 requirements for broadcast exciters. This product is also available to meet most International standards. -
Page 5: Installation
MODEL 2000 TELEVISION MODULATOR Slow clamping for certain baseband scrambling methods. We can provide many other optional configurations. Contact factory for information. INSTALLATION: MOUNTING: This product is designed to be mounted in a standard EIA 19-inch wide rack. Space should be left above and below the unit for ventilation. - Page 6 MODEL 2000 TELEVISION MODULATOR improves. The input is configured as a bridging input and, if 600 ohm termination is required, an external resistor may be connected between the + and terminals on the plug. An unbalanced line must be a shielded cable except for very short runs of a few inches. Hum and noise pickup is likely due to the lack of common mode rejection as provided by a balanced line.
- Page 7 MODEL 2000 TELEVISION MODULATOR NOTE: All connectors are standard “F”, and mating connectors should be lightly wrench tightened and properly crimped to the cable. CONTROLS: All operating controls and indicators are present on the front panel except for the audio select switch which is located on the rear panel of products with certain audio options such as subcarrier inputs.
- Page 8 MODEL 2000 TELEVISION MODULATOR this control to reduce level. This will maintain optimum signal-to-noise ratios. Accurate adjustment requires a spectrum analyzer or calibrated tunable signal strength meter. T.P. 20DB: Test point used to monitor the composite output or video carrier output on units without composite outputs.